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Effect of annealing on photovoltaic characteristics of nanostructured p-Cu2S/n-CdS thin film

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  • Taur, Vidya S.
  • Joshi, Rajesh A.
  • Ghule, Anil V.
  • Sharma, Ramphal

Abstract

Nanostructured heterojunction solar cells of CdS/Cu2S were grown by simple chemical ion exchange reaction by immersing the CdS thin films in Cu ion solution at room temperature. The as-grown nanostructured thin films were annealed at 250 °C in air for improving the interface and crystallinity of the heterojunction. These as grown and annealed nanostructured heterojunction were characterized for photovoltaic and other optoelectronic characteristics. Increase in conversion efficiency is obtained from annealed (η = 0.24%) than the as grown heterojunction (η = 0.09%), on illuminating to 100 mW/cm2 light source. The X-ray diffraction (XRD) pattern confirms improvement in crystallinity with increase in crystallite size from 29 to 32 nm on annealing. The optical absorbance strength observed to be increased along with red shift in energy band gap value from Eg = 2.02–2.20 eV after annealing.

Suggested Citation

  • Taur, Vidya S. & Joshi, Rajesh A. & Ghule, Anil V. & Sharma, Ramphal, 2012. "Effect of annealing on photovoltaic characteristics of nanostructured p-Cu2S/n-CdS thin film," Renewable Energy, Elsevier, vol. 38(1), pages 219-223.
    • Handle: RePEc:eee:renene:v:38:y:2012:i:1:p:219-223
    DOI: 10.1016/j.renene.2011.07.024
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    1. Diniz, A.S.A.C. & Kiely, C.J., 2004. "Crystallisation of indium-tin-oxide (ITO) thin films," Renewable Energy, Elsevier, vol. 29(13), pages 2037-2051.
    2. Hakim, A. & Hossain, J. & Khan, K.A., 2009. "Temperature effect on the electrical properties of undoped NiO thin films," Renewable Energy, Elsevier, vol. 34(12), pages 2625-2629.
    3. Diniz, Antonia Sonia Alves Cardoso, 2011. "The effects of various annealing regimes on the microstructure and physical properties of ITO (In2O3:Sn) thin films deposited by electron beam evaporation for solar energy applications," Renewable Energy, Elsevier, vol. 36(4), pages 1153-1165.
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    1. Diniz, Antonia Sonia Alves Cardoso, 2011. "The effects of various annealing regimes on the microstructure and physical properties of ITO (In2O3:Sn) thin films deposited by electron beam evaporation for solar energy applications," Renewable Energy, Elsevier, vol. 36(4), pages 1153-1165.

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